Flue-cutter.



No. 7Dl,l48. Patented May 27, 1902;

J. CASHMER.

FLUE CUTTER.

(Application filed July 18, 1901.)

(No Model.)

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W a I Min- UNTTED STATE-S, f

PATENT OFFICE.

JACOB CASHMER, OF ELKI-IART, INDIANA.

FLU E CUTT ER.

SPECIFICATION forming part of Letters Patent No. 701,148, dated May 27, 1902.

Application filed July 18, 1901.

To all whom it may concern: 7

Be it known that I, J AOOB (Institute, a citizen of the United States, residing at Elkhart, in the county of Elkhart and State of Indiana, have invented certain new and useful Improvements in Flue-Gutters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in tube or flue cutters, and has for its object the production of a device of this character which will be simple in construction, durable, and eificient in its operation; and it consists in the arrangement and combination of parts, as will be more fully hereinafter described, illustrated in the accompanying drawings, and finally pointed out in the claims.

In the drawings, Figure 1 is a side elevation of the tool complete. Fig. 2 is a longitudinal section of the flue-cutter. Fig. 3 is a transverse section on the line a: w of Fig. 2. Fig. 4 is a detail in perspective of the barrel or tool-guard. Fig. 5 is a side and cross-sectional view of a modified form of spindle. Fig. 6 is a transverse section of the modified form of spindle shown in Fig. 5 assembled with the barrel and cutters.

l designates a shaft or spindle provided with a squared or angular portion 2 at one end and a reduced portion 3 at the other end, which forms the journal for the roller at. Upon the spindle is loosely fitted a sleeve 5 and a collar 6, between which is mounted the barrel or tool-guard 7. Both the sleeve 5 and the collar 6 are free to turn upon the spindle, but are prevented from longitudinal movement by means of a cotter-pin 5, which passes through the sleeve and extends within the annular groove 5 formed within thespindle. A pin 6 extends diametrically through the spindle and holds the collar 6 thereon. A gage 8 is keyed upon the spindle in a manner similarly to that of the sleeve, a second annular groove 8*, in which the cotter-pins 8 fit, being provided for this purpose.

The barrel or tool-guard 7 is provided with diametrically-arranged openings 7*, through which the cutters 7 slide. The tool-guard is formed with a bore of larger diameter at $erial No. 68,858. (No model.)

its end to form a shoulder 7 the inner periphery of which is broken by the diametrically-arranged lugs 7, which engage the ends of a pint), projecting from the periphery of the spindle, and which pin slides in the shoulder 7 when not engaged by the lugs 7.

The spindle is out eccentrically to form a cam 10, and this cam is adapted to lie oppo site or in alinement with the openings 7 in the tool-guard and serves to throw the cutters '7 outwardly when the spindle is re volved. The tool-guard is further provided with openings 11, through which a flat spring 12, connected to the cutters, is inserted. This spring serves to retract the cutter, so that it will immediately be drawn Within the opening 7 when the cam is not pushing it outward. It is preferred to form the cam in themanner shown in Fig. 3; but the spindle may be out with an oval cam, as shown in Figs. 5 and 6, when two cutters will be used, and consequently two springs attached to each cutter, and in which case one half-turn only is required to out the fine; but as it requires considerable more power the single cutter and form of cam shown in Figs. 2 and 3 are preferred.

In operation the flue is inserted over the roller 4 and the tool-guard 7 until the gage 8 strikes the tube-sheet or end of the boiler. The spindle l is then revolved by means of a wrench-socket fitted to its angular end 2,when the cam 10 will engage the cutter or cutters and force them outwardly through the opening 7 in the tool-guard. At the same time the pin 9 engages the lugs 7 at the end of the tool-guard and causes thelatter to revolve with the spindle. The normal position of the pin is such that when it has engaged the lugs 7 the radial movement of the cutters is arrested and the spindle and guard are rotating together, so that the cutters are held projected by the cam until the tube has been cut. The sleeve 5 and collar 6 serve to steady the spindle when the cutter is in operation. When the flue has been cut, the spindle may be turned in the opposite direction until the pressure on the cutters caused by the cam is released, and the spring 12 will cause the cutters to be retracted to the position shown in full lines in Figs. 3 and 6.

Having thus described inyinvcntion, what too I claim, and desire to secure by Letters Patent, is-

1. In a flue-cutter, the combination with a spindle having a cam formed thereon, of a tool-guard loosely mounted upon the spindle and provided with openings in its sides, cutters carried by the guard and adapted to be projected radially through said openings by the cam, and means on the spindle to engage the guard to hold the cutters projected during the cutting operation.

2. A flue-cutter comprising a spindle hav ingacam formed thereon, a tool-guard mounted on the spindle, cutters carried by said guard and adapted to be moved radially by the cam when the spindle is rotated, a cotterpin carried by the spindle to engage the guard, whereby the spindle and guard are rotated together and the cutters are held projected during the cutting operation, substantially as specified.

3. A flue-cutter comprising a spindle having annular grooves formed thereon, a toolspindle is partially rotated, a pin carried by the spindle to engage the guard and arrest the independent movement of-the spindle, a gage swiveled on the spindle, and means to prevent the spindle from Wabbling, substantially as specified.

4:. In a flue-cutter, the combination with a spindle, having an eccentric formed thereon, of a tool-guard mounted upon the spindle, and provided With diametrically-arranged openings, radially-movable cutters mounted in said openings, and adapted to contact with the eccentric formed on the spindle, a cotterpin carried by the spindle, lugs formed on the ends of the tool-guard with which the cotterpin contacts to revolve the guard, the sleeve 5, collar 6 for steadying the spindle, and a gage swiveled upon the spindle, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

JACOB OASHMER.

Witnesses:

ROBERT E. BESTON, FRANK B. SNYDER, 

